[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.502277][ T31] audit: type=1800 audit(1572598226.555:25): pid=11224 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.525161][ T31] audit: type=1800 audit(1572598226.575:26): pid=11224 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.561547][ T31] audit: type=1800 audit(1572598226.595:27): pid=11224 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. 2019/11/01 08:50:42 parsed 1 programs 2019/11/01 08:50:50 executed programs: 0 syzkaller login: [ 101.405534][T11390] IPVS: ftp: loaded support on port[0] = 21 [ 101.484343][T11390] chnl_net:caif_netlink_parms(): no params data found [ 101.518871][T11390] bridge0: port 1(bridge_slave_0) entered blocking state [ 101.526092][T11390] bridge0: port 1(bridge_slave_0) entered disabled state [ 101.534406][T11390] device bridge_slave_0 entered promiscuous mode [ 101.542821][T11390] bridge0: port 2(bridge_slave_1) entered blocking state [ 101.549951][T11390] bridge0: port 2(bridge_slave_1) entered disabled state [ 101.558539][T11390] device bridge_slave_1 entered promiscuous mode [ 101.579572][T11390] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 101.590929][T11390] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 101.613779][T11390] team0: Port device team_slave_0 added [ 101.621349][T11390] team0: Port device team_slave_1 added [ 101.674540][T11390] device hsr_slave_0 entered promiscuous mode [ 101.722177][T11390] device hsr_slave_1 entered promiscuous mode [ 101.848460][T11390] bridge0: port 2(bridge_slave_1) entered blocking state [ 101.855773][T11390] bridge0: port 2(bridge_slave_1) entered forwarding state [ 101.863610][T11390] bridge0: port 1(bridge_slave_0) entered blocking state [ 101.870834][T11390] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.001118][T11390] 8021q: adding VLAN 0 to HW filter on device bond0 [ 102.040720][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 102.075557][ T3381] bridge0: port 1(bridge_slave_0) entered disabled state [ 102.093033][ T3381] bridge0: port 2(bridge_slave_1) entered disabled state [ 102.122624][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 102.161258][T11390] 8021q: adding VLAN 0 to HW filter on device team0 [ 102.199612][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 102.208694][ T3381] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.215946][ T3381] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.288230][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 102.297949][ T3381] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.305230][ T3381] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.315740][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 102.325924][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 102.364170][T11390] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 102.375121][T11390] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 102.444851][T11390] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 102.468107][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 102.477502][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 102.487054][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 102.533263][ T3381] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 103.132242][ T24] Bluetooth: Error in BCSP hdr checksum [ 103.392010][ T7] Bluetooth: Error in BCSP hdr checksum [ 104.901764][ T3381] Bluetooth: hci0: command 0x1003 tx timeout [ 104.908015][T11434] Bluetooth: hci0: sending frame failed (-49) [ 106.981781][ T17] Bluetooth: hci0: command 0x1001 tx timeout [ 106.988036][T11434] Bluetooth: hci0: sending frame failed (-49) [ 109.061767][ T3381] Bluetooth: hci0: command 0x1009 tx timeout [ 113.063982][T11428] ===================================================== [ 113.070954][T11428] BUG: KMSAN: use-after-free in kfree_skb+0x23c/0x4c0 [ 113.077700][T11428] CPU: 1 PID: 11428 Comm: syz-executor.0 Not tainted 5.4.0-rc5+ #0 [ 113.085572][T11428] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.095604][T11428] Call Trace: [ 113.098877][T11428] dump_stack+0x191/0x1f0 [ 113.103192][T11428] kmsan_report+0x128/0x220 [ 113.107675][T11428] __msan_warning+0x73/0xe0 [ 113.112181][T11428] kfree_skb+0x23c/0x4c0 [ 113.116426][T11428] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 113.122307][T11428] bcsp_close+0x127/0x1e0 [ 113.126616][T11428] ? bcsp_open+0x5d0/0x5d0 [ 113.131015][T11428] hci_uart_tty_close+0x385/0x410 [ 113.136030][T11428] ? hci_uart_tty_open+0x5a0/0x5a0 [ 113.141122][T11428] tty_ldisc_release+0x5dd/0xd50 [ 113.146045][T11428] tty_release_struct+0x4f/0x1d0 [ 113.150977][T11428] ? tty_unlock+0x82/0x100 [ 113.155399][T11428] tty_release+0x1be2/0x1e80 [ 113.159981][T11428] ? tty_release_struct+0x1d0/0x1d0 [ 113.165162][T11428] __fput+0x4c9/0xba0 [ 113.169131][T11428] ____fput+0x37/0x40 [ 113.173094][T11428] ? fput_many+0x2a0/0x2a0 [ 113.177487][T11428] task_work_run+0x22e/0x2a0 [ 113.182058][T11428] prepare_exit_to_usermode+0x39d/0x4d0 [ 113.187584][T11428] syscall_return_slowpath+0x90/0x610 [ 113.192942][T11428] do_syscall_64+0xdc/0x160 [ 113.197424][T11428] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.203292][T11428] RIP: 0033:0x413ae1 [ 113.207164][T11428] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 113.226747][T11428] RSP: 002b:00007ffebaf215f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 113.235136][T11428] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413ae1 [ 113.243090][T11428] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 113.251038][T11428] RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff [ 113.258991][T11428] R10: 00007ffebaf216d0 R11: 0000000000000293 R12: 000000000075c9a0 [ 113.266940][T11428] R13: 000000000075c9a0 R14: 0000000000760320 R15: 000000000075bfd4 [ 113.274909][T11428] [ 113.277218][T11428] Uninit was created at: [ 113.281472][T11428] kmsan_internal_poison_shadow+0x60/0x120 [ 113.287260][T11428] kmsan_slab_free+0x8d/0xf0 [ 113.291840][T11428] kmem_cache_free+0x2d1/0x2b70 [ 113.296678][T11428] kfree_skb+0x473/0x4c0 [ 113.300902][T11428] hsr_forward_skb+0x1e9/0x3070 [ 113.305731][T11428] hsr_dev_xmit+0xf8/0x160 [ 113.310132][T11428] dev_hard_start_xmit+0x51a/0xab0 [ 113.315227][T11428] __dev_queue_xmit+0x35b6/0x4200 [ 113.320237][T11428] dev_queue_xmit+0x4b/0x60 [ 113.324717][T11428] neigh_connected_output+0x66f/0x6f0 [ 113.330076][T11428] ip6_finish_output2+0x2129/0x2670 [ 113.335256][T11428] __ip6_finish_output+0x83d/0x8f0 [ 113.340344][T11428] ip6_finish_output+0x2db/0x420 [ 113.345259][T11428] ip6_output+0x5d3/0x720 [ 113.349560][T11428] mld_sendpack+0xebd/0x13d0 [ 113.354124][T11428] mld_send_initial_cr+0x450/0x4d0 [ 113.359208][T11428] mld_dad_timer_expire+0x4d/0x550 [ 113.364293][T11428] call_timer_fn+0x232/0x530 [ 113.368855][T11428] __run_timers+0xd60/0x1270 [ 113.373420][T11428] run_timer_softirq+0x2d/0x50 [ 113.378161][T11428] __do_softirq+0x4a1/0x83a [ 113.382639][T11428] irq_exit+0x230/0x280 [ 113.386781][T11428] exiting_irq+0xe/0x10 [ 113.390910][T11428] smp_apic_timer_interrupt+0x48/0x70 [ 113.396258][T11428] apic_timer_interrupt+0x2e/0x40 [ 113.401256][T11428] default_idle+0x53/0x90 [ 113.405578][T11428] arch_cpu_idle+0x25/0x30 [ 113.409967][T11428] do_idle+0x1d5/0x780 [ 113.414012][T11428] cpu_startup_entry+0x45/0x50 [ 113.418820][T11428] rest_init+0x1be/0x1f0 [ 113.423058][T11428] arch_call_rest_init+0x13/0x15 [ 113.427976][T11428] start_kernel+0x987/0xb57 [ 113.432457][T11428] x86_64_start_reservations+0x18/0x2e [ 113.437894][T11428] x86_64_start_kernel+0x81/0x84 [ 113.442811][T11428] secondary_startup_64+0xa4/0xb0 [ 113.447804][T11428] ===================================================== [ 113.454708][T11428] Disabling lock debugging due to kernel taint [ 113.460833][T11428] Kernel panic - not syncing: panic_on_warn set ... [ 113.467398][T11428] CPU: 1 PID: 11428 Comm: syz-executor.0 Tainted: G B 5.4.0-rc5+ #0 [ 113.476686][T11428] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.486725][T11428] Call Trace: [ 113.490000][T11428] dump_stack+0x191/0x1f0 [ 113.494310][T11428] panic+0x3c9/0xc1e [ 113.498195][T11428] kmsan_report+0x215/0x220 [ 113.502678][T11428] __msan_warning+0x73/0xe0 [ 113.507175][T11428] kfree_skb+0x23c/0x4c0 [ 113.511428][T11428] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 113.517311][T11428] bcsp_close+0x127/0x1e0 [ 113.521631][T11428] ? bcsp_open+0x5d0/0x5d0 [ 113.526045][T11428] hci_uart_tty_close+0x385/0x410 [ 113.531079][T11428] ? hci_uart_tty_open+0x5a0/0x5a0 [ 113.536173][T11428] tty_ldisc_release+0x5dd/0xd50 [ 113.541094][T11428] tty_release_struct+0x4f/0x1d0 [ 113.546013][T11428] ? tty_unlock+0x82/0x100 [ 113.550407][T11428] tty_release+0x1be2/0x1e80 [ 113.554990][T11428] ? tty_release_struct+0x1d0/0x1d0 [ 113.560161][T11428] __fput+0x4c9/0xba0 [ 113.564141][T11428] ____fput+0x37/0x40 [ 113.568097][T11428] ? fput_many+0x2a0/0x2a0 [ 113.572504][T11428] task_work_run+0x22e/0x2a0 [ 113.577075][T11428] prepare_exit_to_usermode+0x39d/0x4d0 [ 113.582604][T11428] syscall_return_slowpath+0x90/0x610 [ 113.587960][T11428] do_syscall_64+0xdc/0x160 [ 113.592442][T11428] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 113.598307][T11428] RIP: 0033:0x413ae1 [ 113.602180][T11428] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 113.621773][T11428] RSP: 002b:00007ffebaf215f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 113.630157][T11428] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413ae1 [ 113.638103][T11428] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 113.646052][T11428] RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff [ 113.653999][T11428] R10: 00007ffebaf216d0 R11: 0000000000000293 R12: 000000000075c9a0 [ 113.661948][T11428] R13: 000000000075c9a0 R14: 0000000000760320 R15: 000000000075bfd4 [ 113.671113][T11428] Kernel Offset: disabled [ 113.675434][T11428] Rebooting in 86400 seconds..